A prop plane made an emergency landing on a Long Island highway Wednesday afternoon just hours after a helicopter went down near a Long Island beach.

The Cessna C206 aircraft made a “precautionary landing” on the westbound lane of Sunrise Highway exit 57 at 1 p.m., according to Federal Aviation Administration officials.

Pilots make such landings when continuing flight is “possible but inadvisable” — in conditions such as “deteriorating weather, being lost, fuel shortage, and gradually developing engine trouble,” according to documents from the FAA.

The sight of an airplane on the road shocked passersby.

“I normally expect traffic driving out east. I do not expect it to be because a plane landed on Sunrise Highway,” tweeted user @_katherine.

The reason for the landing was not immediately clear, according to authorities, who said the pilot was the only person aboard.

The plane is registered to James O’Donnell and was scheduled to fly between Brookhaven, LI, and Eagleswood, New Jersey, according to flight tracker Flightaware.com.